/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.icanci.design.builder.factorypattern.case01;

import java.util.HashMap;
import java.util.Map;

/**
 * @author icanci
 * @date Created in 2021/07/10 13:28
 * @version 1.0
 */
public class SimpleFactory2 {
    private SimpleFactory2() {

    }

    /**
     * 优点：避免了 if else 或者 switch case
     * 缺点：创建的对象是同样的
     * 应用场景：输入输出值不要求不一致的情况下
     *         如 key:枚举 value:枚举
     */
    private static final Map<Integer, IProduct> map = new HashMap();
    static {
        map.put(Kind2.PRODUCT_A, new ProductA());
        map.put(Kind2.PRODUCT_B, new ProductA());
        map.put(Kind2.PRODUCT_C, new ProductA());
        map.put(Kind2.PRODUCT_OTHER, new ProductA());
    }

    /**
     * 创建对象
     * @param kind 类型
     * @return 返回对象
     */
    public static IProduct getProduct(int kind) {
        IProduct iProduct = map.get(kind);
        if (iProduct == null) {
            return map.get(Kind2.PRODUCT_OTHER);
        }
        return iProduct;
    }
}

/**
 * Kind 列表
 */
final class Kind2 {
    public static final int PRODUCT_A     = 1;
    public static final int PRODUCT_B     = 2;
    public static final int PRODUCT_C     = 3;
    public static final int PRODUCT_OTHER = 4;
}